Red Flag

(A). (i) In the Roman empire it signified war and
a call to arms. (ii) Hoisted by British seamen, it indicates
that no concession will be made. As a railway signal, it intimates
danger, and warns the engine-driver to stop. (iii) In France, since 1791, it has been the symbol of insurrection and terrorism. (iv)
It is a synonym of Radicalism and Anarchy.